Which policy you modified and where you linked it? This is computer policy, so it should be linked to computers OU. Run RSoP.msc on one PC and check if this policy is applied. If not, reboot PC and check

Which policy you modified and where you linked it? This is computer policy, so it should be linked to computers OU. Run RSoP.msc on one PC and check if this policy is applied. If not, reboot PC and check once again.

I manually entered the DNS suffix search list on a client and it then worked fine. Although when I then removed the entries and restarted it still worked?? Ipconfig /all then showed both domains in the search list which wasnt there previously despite the group policy. Other PC's are still not picking up the Group Policy.

I've entered the group policy under the Default Group Policy of my domain,

If you mean the default Computers container you cannot link policies there. However, if you've set it in the Default Domain Policy you really don't need to.

I suggest you head to one of the PCs and run:

rsop.msc

That will open the Resultant Set of Policy tool, expand the tree and see if you can see the policy. Also check out any errors it raises (right click on Computer Configuration, open Properties and check Error Information).

Otherwise you will need to check the Event Viewer for any errors associated with group policy application.

I went to one of the PC's, run rsop.msc, expanded the tree to the group policy in question. There was an egg timer for a minute or so. All appeared correct so I opened the command prompt to test and it worked??

Will I have to do this for all the PC's in question? Or is the new group policy simply taking a while to filter around the network. We have a couple of hundred PC's.

@ Chris
Why isn't the intended result covered in DNS? I thought DNS resolved the FQDN to an IP address?.. and you can set up a trust or zone transfers to provide resolution to clients that the server is not actually authoritative for.

Maybe I am missing something, but it appears DNS already has the desired effect the author is wishing for. So, I was wondering if you are reinventing the wheel.

Numerous times I have been asked this questions that what is it that makes my machine log on so slow, there have been cases where computers took 23 minute exactly after taking password and getting to the desktop.
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